Not sure if K2 is what is slowing your site down. In fact it opened just fine for me. Have you noticed an increase in loading times on Google Analytics?
Anyway, I can suggest cloudflare.com - I'm using it.
hi. if you go to my home page www.in2town.co.uk then it is not to bad, the problem happens if you go to the menu bar and press the travel section, or showbiz gossip, or soap gossip or go on the home page and press one of the articles, this is when it becomes real slow